You spend an hour writing the perfect event invitation. You send it to 400 members. Forty people open it. The event is half empty. Before you blame the content or the timing, ask a harder question: how many of those 400 emails actually reached the inbox?
Email deliverability is the invisible problem behind a lot of low engagement. An email that lands in spam may as well have never been sent. The good news is that deliverability is mostly technical, which means it is fixable once you know what to look for.
Authenticate Your Domain First
The single biggest deliverability lever is proving to mailbox providers that your emails are really from you. This is done with three records added to your domain’s DNS settings: SPF, DKIM, and DMARC.
SPF lists which servers are allowed to send mail on your behalf. DKIM adds a cryptographic signature that proves the message was not tampered with. DMARC tells providers what to do when a message fails those checks. Without these, Gmail and Outlook treat your chamber’s email with suspicion, and many will route it straight to spam.
If you send through a platform, it will give you the exact records to add. You add them once, and they protect every email you send afterward. If you are not sure whether yours are set up, that is the first thing to check this week.
Stop Sending From a Free Address
If your newsletters go out from yourchamber@gmail.com, you have a built-in problem. Gmail and Yahoo now penalize bulk mail sent from their own free domains by anyone other than the account owner. Sending hundreds of messages from a free address looks exactly like what spammers do.
Send from your own domain instead, something like hello@yourchamber.org. It builds trust with mailbox providers, reinforces your chamber’s brand, and gives you control over your sending reputation.
Protect Your Sender Reputation
Mailbox providers track how recipients treat your mail. High open rates, replies, and people moving you out of spam build a good reputation. Spam complaints, hard bounces, and emails to dead addresses destroy it.
A few habits keep your reputation healthy. Remove addresses that hard bounce instead of emailing them again. Make unsubscribing easy and obvious, because a visible unsubscribe link is far better than a frustrated member hitting the spam button. Email people who actually want to hear from you rather than blasting your entire list every time.
Watch the Content Signals
Content matters less than authentication, but it still matters. A few patterns trip spam filters more often than chamber staff expect.
Avoid writing subject lines in all capitals or stuffing them with exclamation marks. Keep a reasonable balance of text to images, since an email that is one giant image with almost no text looks suspicious. Limit the number of links, and avoid link shorteners that hide the real destination. None of this means your emails should be bland, it just means a few small adjustments keep you on the right side of the filters.
Test Before You Send to Everyone
Before a big send, mail the campaign to yourself and to a couple of colleagues on different providers, ideally one Gmail and one Outlook address. Check where it lands. If it goes to spam on a fresh account, your members are seeing the same thing.
Free tools can also score your email and flag deliverability issues before you send. Five minutes of testing can save an entire campaign.
Deliverability Is a Membership Issue
It is easy to think of deliverability as an IT detail, but it is really about member value. Every event reminder, renewal notice, and member spotlight only works if it arrives. Getting this right means more event attendance, smoother renewals, and members who feel connected because they actually hear from you.
My Chamber Buddy handles authentication and sender reputation for you, so your emails reach the inbox without you needing to become a DNS expert. See how we can help your chamber communicate better.